@article{DE_1998_34_8_a9,
     author = {V. K. Andreev and A. A. Rodionov},
     title = {Invariant submodels of rank two for equations of a nonhomogeneous heavy fluid},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1082--1091},
     publisher = {mathdoc},
     volume = {34},
     number = {8},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_8_a9/}
}